package com.zang.netty.nettyio.client;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;

import java.util.logging.Logger;

/**
 * @author Zhang Qiang
 * @Date 2019/7/20 17:08
 */
public class TimeClienHandlerByNetty extends ChannelHandlerAdapter {
    private static final Logger logger = Logger.getLogger(TimeClienHandlerByNetty.class.getName());
    private final ByteBuf firstMessage;


    public TimeClienHandlerByNetty() {
        byte[] req = "QUERY TIME ORDER".getBytes();
        this.firstMessage = Unpooled.buffer(req.length);
        firstMessage.writeBytes(req);
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx){
        ctx.writeAndFlush(firstMessage);
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf byteBuf = (ByteBuf) msg;
        byte[] req = new byte[byteBuf.readableBytes()];
        byteBuf.readBytes(req);
        String body = new String(req, "UTF-8");
        System.out.println(" Now is : " + body);

    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.warning(" Unexpected exception from downstream : " + cause.getMessage());
        ctx.close();
    }


}
